Exchange 2007, is there anyway you can hide some contact from the global list for some users and not other users

Hi there

I have a small test test server running whit exchange 2007.

I have some Test user on it and what i will like to do is this.

Test user 1, can see test user 2 and 3, but not test user 4 and 5, in the global address list in exchange 2007

Test user 2, can see test user 1 and 3, but not test user 4 and 5, in the global address list in exchange 2007

Test user 3, can see test user 1 and 2, but not test user 4 and 5, in the global address list in exchange 2007

Test user 4, can see test user 5, but not test user 1, 2  and 3, in the global address list in exchange 2007

Test user 5, can see test user 4, but not test user 1, 2  and 3, in the global address list in exchange 2007

Is this Posible ???

Best

Christian